Word: liquidoxygen
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Investigators say the accident occurred when ajoint in a solid rocket booster failed and causedsuperheated gases to burn through the externalfuel tank containing liquid hydrogen and liquidoxygen, triggering the explosion...
After the initial blast, the slow motionvideotape replays showed an explosion of the hugeexternal fuel tank, which carried half a milliongallons of super-cold, super-volatile liquidoxygen and hydrogen. Challenger, dwarfed by thefuel tank, burst into pieces which rained into theAtlantic for 45 minutes...
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